ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%3DC%28NCC1%3DCN%3DC%28S1%29Cl%29NN%20%28%3DO%29O-/file?format=sdf&get3d=True  -- CN%3DC%28NCC1%3DCN%3DC%28S1%29Cl%29NN%20%28%3DO%29O- could not be loaded.